Improvement in mechanical movements



C. B. WITHINGTON.

MECHANICAL-MOVEMENT. No,170,9Z7 Patented Dec. 7, 1375..

WIT.7\/"ESSES WVENTOR (0b m E By his flttorney N. PEIERS,PHDTO-LITNOGRAPHER, WASHINGTON, D C,

MK M' UNITED STATES PATENT OFFICE.

CHARLES B. WITEIIIIGTON, OF JANESVILLE, WISCONSIN.

IMPROVEMENT IN MECHANICAL MOVEMENTS.-

Specification forming part of Letters Patent No. 170,927, dated December7, 1875; application filed November 22,1875.

To all whom it may concern:

Be it known that 1, CHARLES B. WITHING- TON, of Janesville, Rock county,Wisconsin, have invented a new and Improved Mechanical Movement, ofwhich the following is a specification:

The object of my invention is to convert continuous movement in onedirection into'an intermittent reciprocating one, which end I attain bycombining a chain traversing continuously in one direction oversprocket-wheels; a shaft connected therewith by a link or stirrup, andhaving an intermittent semi-rotative movement; and a frame upon whichthe shaft is mounted, reciprocating upon suitable ways.

My invention further consists in a grooved plate or camway on the shaft,operating in connection with stop-pins on the frame, to hold the slidingframe still positively while the shaft is turning.

In the accompanying drawings, Figure 1 represents a plan or top view ofmy improved apparatus; Fig. 2, a vertical longitudinal sectiontherethrough on the line 00 m of Fig. 1; and Fig. 3 a section on theline 3 y of Fig. 1.

The mechanism is mounted, by preference, in a stout box-frame, A. Adrivingshaft, B, driven bya pulley or other well-known means from anysuitable prime mover, carries a double sprocket-wheel or twosprocket-wheels, G 0, one or both of which may be provided withguard-flanges c, in which semicircular notches c are out, for a purposehereinafter mentioned. The sprocket-wheels G 0 gear into correspondingspur-wheels D D, mounted on independent stud-shafts d al One or both ofthese spur-wheels may likewise be provided with notched guard-flanges dcorresponding with those c of the sprocket-wheels.

In the drawings I have shown one of these flanges on the sprocket-wheelC, and another on the spur-wheel D, which gears with the wheel 0, thewheel D having no flange. The teeth of the wheels 0 D come opposite thespaces between the teeth of the corresponding wheels 0 D, by whichconstruction I am enabled to apply the power to the chain moreconstantly, and thereby give it a regular motion; but with such anarrangement the bars of the chain hereinafter described would not restproperly between the teeth of the wheels.

This objection I obviate by cutting away ;a toothwherever a bar of thechain would come, and forming a notch in the guard-flange at that pointin which the bar is held.

A square-linked endless chain, E, runs on the wheels D D, and on acorresponding set of sprocket-wheels, F, at the opposite end of theframe A. A carrying-frame, Gr, reciprocates-on ways a on this frame, andcarries a shaft, h, to which a slotted link or stirrup, H, is secured.The slotted portion of the link fits on one of the bars of the chain,and traverses with it, drawing the sliding carriage or carrying-frame Galongwith it. The shaft h reciprocates in slots h in this frame, whilethe link traverses vertical slots 13 therein.

The rotation of the sprocketwheels G C imparts a continuous movement inone direction to the chain. In Fig. 1 thesliding carriage is shown asstationary while the link H is turning with the chain between the wheelsF, which are, like those D D, mounted on studaxles, so as to leave aspace between them in.

which the link H moves. To hold the sliding carriage positively stillwhile this turning movement of the slotted link and its shaft h takesplace, a hub or shell, I, on said shaft is provided with a semicirculargroove or camway, (see Fig. 3,) or even a simple flange will answerconcentric with the shaft, which semicircular groove or camway worksover a stud or stop-pins, l l, at each end of the frame, and thus holdsthe sliding frame securely as long as the cam way and stop-pin areengaged while the shaft is being turned one-half revolution. As soon asthe bar of the chain. on which the slotted link works has passed uparound the sprocket-wheels and begins to drag on the link, the slidingcarriage is released by the stop and-follows the chain to the other endof the frame, when the link passes down between the wheels D D, and thecarriage slides back to its former position, with the link in theposition shown in Fig. 2.

It is obvious that mechanism mounted on the sliding carriage G may, inaddition to the traversing movement of said carriage, be vibrated orintermittently rotated by cranks and pitmen and link connections fromthe shaft h, which has a semi-rotative movement imparted to it at eachend of its traverse.

I have found the mechanism above described useful and effective inconnection with automatic grainbinding mechanism invented and used byme. It might, obviously, also be usefully applied to printing or othermechanism to which it is desired to impart an intermittentreciprocation.

I claim as myinvention- 1. The combination, substantially ashereinbefore set forth, of a chain traversing over suitable pulleys, ashaft connected with said chain by a slotted link and a traversingcarriage in which said shaft turns, whereby an intermittentreciprocation is imparted to the sliding carriage, and an intermittentsemi-rotative movement imparted to the shaft carried fby 'it.

2. The combination, substantially as hereinbefore set forth, of a chaintraversing continuously in one direction over suitable pulleys, a shaftconnected with said chain by a slotted link, a traversing carriage inwhich said shaft turns, acamway or semicircular grooved plate on theshaft, and stop pins on the frame, whereby the carriage is positivelyheld While the shaft is turning.

In testimony whereof I have hereunto subscribed my name.

(JHAS.. B. WITHIN GTON Witnesses:

I DANIEL W, 00133,

JAMES P. WHEDON.

